Home / 30,047.76-45,071.64-21,126.42

Finding the Fourth Proportional to 30,047.76, 45,071.64 and 21,126.42

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Solution

The fourth proportional to 30,047.76, 45,071.64 and 21,126.42 is: 31,689.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,047.76 : 45,071.64 = 21,126.42 : x
  2. Step 2: Convert to fraction form
    30,047.76/45,071.64 = 21,126.42/x
  3. Step 3: Cross multiply
    30,047.76x = 45,071.64 × 21,126.42
  4. Step 4: Simplify right side
    30,047.76x = 952,202,396.73
  5. Step 5: Solve for x
    x = 952,202,396.73/30,047.76
  6. Step 6: Final answer
    x = 31,689.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.